I have a S&W M&P Crimson trace for sale. The condition is like brand new. I had this on my M&P and never used it. I believe it fits other S&W models but you might want to do your research to make sure which models. It is a LG-660. $200 FTF and $205 shipped.

I also had a Truglo Reddot. This is the dual color (green or red) and has five settings. I mounted to my Ruger MK III and really like it but decided to go back to iron sights.
The condition is like brand new. $65 FTF and $70 shipped.